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How did andrew carnegie make his money?

A. he established electricity companies all over the world
B. he established a network of radio companies
C. he set up telegraph offices in the united states and europe
D. he produced steel very efficiently

2 Answers

2 votes
I think c but im not sure you may wanna check 
User Nithin Viswanathan
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2 votes
The answer is D.

I hope this helped! :)
User Whiskeyo
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